<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

</head>
<body>
  <p>哈哈</p>

</body>
<!--内部引入-->
<script>
    alert("弹弹弹~~~");
</script>
<!--  外部引入方式-->
<script src="../js/MyJs.js"></script>
</html>


